Medical Cannabis and Driving: New Rules in New South Wales
The government of the Australian state of New South Wales has proposed changing the rules for drivers who have a prescription for medical cannabis. This will allow them to legally drive a car, even if there are traces of THC (tetrahydrocannabinol) in their system.
Medical cannabis has been legalized in Australia for ten years, but until now, people with a prescription could face the same charges for driving under the influence of drugs as recreational users. Under the new proposal, those who use medical cannabis will be able to get behind the wheel if the THC level in their saliva does not exceed 50 nanograms per milliliter.
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However, if a roadside test returns a positive result for cannabis, the driver will receive an immediate 24-hour driving ban. They will also be required to provide an additional sample for more detailed laboratory analysis. If the result of this test is below the permitted limit, the driver will be able to return to driving.
Fines and Penalties for Exceeding the Limit
Those who exceed the 50 ng/mL threshold will not be penalized immediately. Instead, they may receive two warnings, and charges will only be filed after a third violation. At this stage, penalties become severe: a fine of 704 Australian dollars (approx. 502 US dollars) and a minimum three-month suspension of driving privileges.
Support and Criticism of the Initiative
An Associate Professor from the Monash University Accident Research Centre commented:
“These planned reforms are an important step forward in balancing road safety and the needs of medical cannabis users. They include important safeguards that protect the integrity of the drug-driving enforcement program. Being the world’s first establishment of a roadside THC limit, it is a profound change, analogous to the introduction of a legal blood alcohol limit, and will help police keep the community safe.”
However, not everyone supports this idea. Opposition leader Kelly Sloan stated she would not support this move, citing ABC News.
“The government can set an arbitrary number of milligrams of the drug in the system, but we know that every person reacts differently, their impairment varies, and until we have scientific data on this, we should not be pushing through these laws,” she said.
The introduction of such a limit is an unprecedented step in global practice, as no country has previously established a clear roadside threshold for THC. This sparks debate about how accurately the degree of a driver’s impairment can be determined solely by the level of the substance in saliva, given that the effects of cannabis are individual for each person. While the reform aims to ease the lives of patients, it also highlights the complexity of balancing medical needs with strict road safety requirements. Further research and practical application will show whether this approach becomes an effective tool for the police and whether it will lead to new legal conflicts.

